Improvement in casting- bearing-s for machinery



'wards designate the points which we believeto be or sunk in cooling.

cited ,time

wjmD/tw@ i @met i @t fiiw. Ma-@QW 0F WILLAMSPORT, PENNSYLVANIA.

Letters Patent No. 85,341,'dated December 29, 1868.

4ROVEIMEI-.TITI`- IN CASTING BEARING-S FOR MACHINERY.

The Schedule referred` to in these Letters Patent and making part of thersaxne.

To all whom it may concern Be it known that we, HENRY F. SNYnnu, GEORGE S. SNYDER, and WILLIAM N. J oNns, of' Williamsport, in the `county of Lycoming, and in the State of Pennsylvania, have invented certain new and useful Improvements in the Manufacture of Boxes for Machine-Bearings; and we do hereby declare that the following is a-full and exact description thereof. l

Our boxes are mainly of iron, with a lining or bearing-surface of brass, cast therein iu a' novel 'manuel'. They may be cheaply produced, and combine the strength of iron with the frictional qualities of brass, and are highly durable and serviceable.

We Will rst describe what we consider the liest means of carrying out our invention, and will afternew.

The accompanying drawings form a part -of this specification.

Figure 1 is a side elevation of our boxes, complete.

Figm'e 2 is a plan view ofthe same, represented as put together, before` the projecting ends of the brass part are cut oif.

Figure 3 is a cross-section through the centre of the same.

The remaining figures show the progress of the work at the earlier stages. Y

Figure 4 is a section through the mould before the iron is poured in. t represents the brass portion of the casting as having been previously cast in another mould, and iitted in'its place in this mould, ready to lhave the iron poured in contact therewith, the brass being longer than the cavity for the iron.

Figure 5 represents a corresponding section of the mould after the iron has been poured and has commencedto impart its heat to the brass.

Figure 6 represents the same after the iron has heated the brass to about the same temperature as itself. -At this stage the iron chills, or assu-mes a solid form, while the brass, by reason of its greater fusibility, assumes a liquid form, or melts. In this condition we turn up the entire mould and its contents up'on one side. Y

Figure 7 shows the mould'thus-turned, and the metals cooling slowly1 but the brass casting notyet' shrunk materially. y

Figure 8 shows the same after the brass has settled Figure 9 shows the entire b oX after it is completely cooled and removed from the mould.

Similar letters of reference Aindicate corresponding parts in allthe figures.

, A A are staves of brass, cast in any ordinary approved manner, and of length considerably greater than'the bearing is'vintended to be when inished.

Now, having prepared a suitable mould in which to cast the iron part of our box, we introduce one of the staves of brass therein, and having properly closed the mould, we pour the iron so that it ilows around the brass, and congeals there.

So soon as the iron is in contact with the brass, it

rlhe liquid brass ultimately cools, and assumes a soldfOrm, and thus forms a lining imbedded in the iron.

The superlluous length given to the brass stave A allows for the shrinkage which comes in the cooling of the brass. We can place the stave in the mould so that both .ends project, but this is not, in ordinary cases, necessary. We ordinarily place it with one end flush with the iron, and with the other end projecting, as indicated bye C.

We judge, as nearly as possible,A when the period has arrived when the brass will melt. At or alittle before this period we turn the ,mould and its contents upon one side, so that the projecting end of' the brass stave shall be uppermost. 1n this condition the melted brass settles by gravity into the cavity in the iron, and continues to fill it very tightly as the brass shrinks.

l The final result is va casting of brass, hlling thev cavity in the iron, and adhering thereto with great strength, while the projection C is greatly contracted in its extent. In other words, the projection C of the brass, above the iron, forms a sinking-head,

which allows the brass to contract all that is required i in the act of cooling, without forming any bubbles, or other faults.

We have experimented with this invention very extensively for several -mouths, and have made, or caused to be made, in this manner, boxes varying from very small sizes up to the weight of iive hundred pounds or more.- These are in use iulheavy millwork in our vicinity, and are very'highly approved.

Weare aware that many efforts have before been made to combine iron with brass and other fusible metals, so as to obtain the surface ofthe softer metal with the strength of iron, but the previous attempts Ato cast them together' have not come into use, by "reason of the practical diiiculties attendingthe operation.

Our method is perfectly successful. Not one casting has been lostsiueethe Workmen have become aocustomed to the manipulation, so as to judge of the proper temperatures and periods. v

We do not claim anything shown or described in the patent; issued to Daniel Taylor, dated June 30,

1857 but; having now fully described our invention,

What we ela-im as new, and for which we desire to secure Letters Patent, is as follows:

We claim the withindeseribed inode of producing compound boxes, of iron and brass, united together,

forming the brass with a sinking-head projecting above the iron, so as to aid in compensating for the diiereneeof contraction of the parts in cooling, sub- H. E. SNYDER.

G. S. SNYDER. VvTitnesses: W. N. JONES.

T. O. ROGERS, H. D. HEISER.

stantifdly as herein set forth. 

